Wikipedia has several basic sourcing and content policies. Of them, the Wikipedia:Neutral Point of View, Wikipedia:Verifiability, and Wikipedia:No original research policies are not fundamental to the nature of an encyclopaedia. Indeed many well-known encyclopaedias have no such policies. They are, however, necessary consequences of the organization that develops, publishes, and maintains Wikipedia, and of the way that Wikipedia is written. Wikipedia:What Wikipedia is not and its ancillaries are fundamental to the nature of an encyclopaedia.